Fenwick, O;
Mauthoor, S;
Cacialli, F;
(2019)
Mapping Sub-Surface Structure of Thin Films in Three Dimensions with an Optical Near-Field.
Advanced Theory and Simulations
, 2
(6)
, Article 1900033. 10.1002/adts.201900033.
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Abstract
Subsurface mapping is crucial to understanding many biological systems as well as structured thin films for (opto)electronic or photonic applications. A non‐invasive method is presented to map subsurface nanostructures from scanning near‐field optical microscopy images. The Bethe–Bouwkamp model is used to simulate imaging of buried nano‐objects or subsurface slanted planar interfaces, and it is shown how to determine their depth and size, or the interface inclination, from just one image. It is shown that the steep optical field gradient makes near‐field microscopy a particularly sensitive depth probe for thin films.
| Type: | Article |
|---|---|
| Title: | Mapping Sub-Surface Structure of Thin Films in Three Dimensions with an Optical Near-Field |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/adts.201900033 |
| Publisher version: | https://doi.org/10.1002/adts.201900033 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | microscopy, sub-surface, near-field, SNOM, NSOM |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10090781 |
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